Today’s case is a 6 month old female neutered Labrador Retriever who is small for her age and has trouble seeing. Post your interpretations in the comments section!
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April 3rd, 2008 at 4:15 am
Findings are similar on both thoracic limbs and include:
- irregularity of the distal ulnar physis
- shortening of the ulna with proximal positioning of the styloid process of the ulna
- cranial and lateral bowing of the radius (radius curvus), with carpal valgus
- thickening of the caudal cortex of the radius and cranial cortex of the ulna due to redistributed tension forces
- severe humero-ulnar incongruence with subluxation
- marked sclerosis of the ulnar notch
- smooth osteophytosis on the non articular surface of the anconeal process
Conclusion: Bilateral radius curvus due to altered distal ulnar physis, secondary elbow dysplasia with severe humero-ulnar subluxation and evidence of Degenerative Joint Disease. Together with the signalment (Labrador, Stunted Growth and vision trouble) the diagnosis is Labrador Retinal and Vitreal Dysplasia with Skeletal Abnormalities (Dwarfism with Retinal Dysplasia). Recommend eye examination to confirm retinal and possibly vitreal abnormalities. This is a hereditary and congenital disorder.
April 7th, 2008 at 2:39 am
I agree with the above comment.
The bones are deformed which indicates dawrfism,
the irregularity of the ulnar growth plates is pronounced.
I was just wondering, what is the long term survival prognosis for this condition?
April 7th, 2008 at 7:59 am
Great observation, the thickness of the radial and ulnar cortices indicates altered weight bearing through these long bones. The history along with the bilaterally symmetric distribution of the abnormalities points toward a congenital disease. Answers are available- click on the link to the case.